STEC01PUR

Specialized ICS Overview

The STEC01PUR is a ground path safety switch featuring an integrated programmable 12 mΩ N-channel power MOSFET. It manages applications requiring high current flow, such as e-cigarette heaters, by interrupting the ground path after a maximum on-time and inhibiting restart during a cooling window. The device accepts PWM control signals between 4 Hz and 5 kHz with 30% to 100% duty cycle. Key electrical parameters include a 2.2 V to 5 V input voltage range, 7 A continuous current capability, and 30 µA battery supply current in active mode.

Specialized ICS Feature Summary

• Integrated 12 mΩ typ. N-channel FET with 7 A continuous current capability
• Programmable timers T1 (max on-time) and T3 (cooling window) for fault protection
• PWM control signal support from 4 Hz to 5 kHz with 30%-100% duty cycle
• Low power consumption with 30 µA active battery supply current and 2-4 µA idle current

Specialized ICS Applications

• Electronic cigarettes
• Timing and reset circuitry
• Ground path protection circuitry

Specialized ICS Procurement Notes

Verify the specific ordering code STEC01PUR against the manufacturer's latest documentation to ensure compatibility with the required package type and environmental compliance grade. Confirm that the application design accounts for the thermal resistance characteristics of the VFQFPN 3x3x0.9 package under expected load conditions.

Specialized ICS Selection Notes

Select this component for low-side switching applications where precise timing control and over-current protection are required. Ensure the external resistor values for the TPF pin align with the desired timer frequencies. For loads exceeding 7 A, utilize the GDRV pin to drive an external N-channel power MOSFET.

Specialized ICS Part Context

The STEC01PUR belongs to STMicroelectronics' specialized ICs category, specifically designed as a power switch for protection circuitry. It is housed in a 16-VFQFPN exposed pad package, suitable for surface mount assembly in compact electronic devices requiring robust ground path management.

Specialized ICS Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify functional equivalence carefully if considering alternative components.

Specialized ICS FAQ

How does the device handle fault conditions?

If the PWM duration exceeds the programmed T1 timer, the device detects a fault, turns off the internal MOSFET, generates a 57 ms reset pulse on the RESET/FAULT pin, and starts the T3 cooling window timer before allowing reactivation.

What is the function of the HW_RESET pin?

The HW_RESET pin monitors input power lines like USB. A rising edge above the threshold generates a 57 ms pulse on the RESET/FAULT output to notify the platform control unit of an external power connection.

Can the device support currents higher than 7 A?

Yes, while the internal MOSFET supports up to 7 A, higher currents can be supported by using an external N-channel power MOSFET driven through the GDRV pin.